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A harmonic wave travelling along the pos...

A harmonic wave travelling along the position direction of X-axis is represented by the equation : `xi=0.3xx10^(-4) cos (220/7t-1.57x)`, where `xi`, t ant x are in cm , second and metre respectively.Deduce the (i)amplitude (ii)wavelength and (iii)time period.

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The correct Answer is:
`(i)0.3xx10^(-4) cm (ii)4 m (iii)0.2 s`
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